Malicious PDF — malware analysis report

Static analysis result for SHA-256 05164d27b5c9cf34…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 05:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cc6212eb40bf2f0486dc01d1e37e1e5 SHA-1: a3d3252178b80a77abe7479c4410755df1ce976f SHA-256: 05164d27b5c9cf343ecb8cbfdc3a4afec7cab4280f9a9cf6287412ca5984c50f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to a redirector service that appears to be part of an SEO link farm. The primary redirector URL is https://ttraff.ru/pify?keyword=2nd+puc+biology+important+questions+pdf, which is designed to lure users with a seemingly relevant document title. The document's structure and the presence of numerous external links suggest a phishing or scam attempt to drive traffic to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=2nd+puc+biology+important+questions+pdf In PDF document text
    • http://files.susannahnix.com/uploads/1/3/0/9/130969306/sadegazulobedup.pdfIn PDF document text
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131409037/a8a5d2ba.pdfIn PDF document text
    • http://files.cutiepetutieoriginals.com/uploads/1/3/2/6/132695478/dugaz_gexetolebujipan_bezab.pdfIn PDF document text
    • http://files.frenetik.org/uploads/1/3/1/1/131164275/jadexefetifipigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/12234224076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/pavefidarod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/rick_ross_teflon_don_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/btech_computer_science_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bakolidologan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/15425111810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/kumofolabozezat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/52973986673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/tomepisovanodakuzujuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/nuniwitekokewavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/dorexosakaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/macbook_define_android_sdk_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/cold_hearted_snake_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/36031276177.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5880 bytes
SHA-256: ce9c027907a53ca76354ae4f6ea2ee5a7433788dd6cf86bd162076be610ee98f
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10400 bytes
SHA-256: 9355776f8781b38a2e611dfe04cab8085572c9caef7a6646b15879e45fd9ce55